{
  "manageEntity": {
    "action": "Save",
    "entityId": "1444345311",
    "entityType": "Track",
    "nonce": "0xcb56a21e73308fc82dfe60385a3f6d470eeb70e3e401fe12a076ee4268dfa13e",
    "signature": "0x5077ec6c17d255ab7162cd5d148be43ee9742af121f33b5def580b53a0f346460367f52cda0e43eeebc7e7918044d6e05528005170b54f013dbef13440acd02c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}